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authorSergei Trofimovich <siarheit@google.com>2020-09-06 12:13:54 +0100
committerSergei Trofimovich <siarheit@google.com>2020-09-22 11:41:04 +0100
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tree031f2bdda3e470e17656355aa44e52c1df8f5f15 /gcc
parent46a274154786678e037fdce5dacd0305cddba0f9 (diff)
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gcov: fix TOPN streaming from shared libraries
Before the change gcc did not stream correctly TOPN counters if counters belonged to a non-local shared object. As a result zero-section optimization generated TOPN sections in a form not recognizable by '__gcov_merge_topn'. The problem happens because in a case of multiple shared objects '__gcov_merge_topn' function is present in address space multiple times (once per each object). The fix is to never rely on function address and predicate on TOPN counter types. libgcc/ChangeLog: PR gcov-profile/96913 * libgcov-driver.c (write_one_data): Avoid function pointer comparison in TOP streaming decision.
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